that gen x venturi is closer to the euroreef venturi, and better than the octo im willing to bet, but i've never held one in my hands or used one. i think luke has used that venturi on his via aqua or odyessea skimmers with a gen x 2400, he might be able to tell you if it works well or as good as the er venturi.
but $15 for a good ER venturi is worth every penny...
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